Manley Extreme Duty Series performance steel valves are a great choice for supercharged, alcohol-burning, or high-revving engines. These engines generate a lot of heat and require special valves that can handle that kind of punishment. All valves are made from the best stainless steel available, with chrome stems and hardened valve tips. Extreme Duty Series valves are swirl-polished and fully machined and available with either undercut heads or straight stems.

More From This Category

Sonnax Line Pressure Modulator Plunger Valve Kit, Ford, 4R100/E4Od 6Cyl & Sm 8 Cyl, Each

Sonnax Line Pressure Modulator Plunger Valve Kit, Ford, 4R100/E4Od 6Cyl & Sm 8 Cyl, Each

$35.37

MANLEY Valve, Street Flo, Intake, 2.02 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, SBC, Each

MANLEY Valve, Street Flo, Intake, 2.02 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, SBC, Each

$35.04

MANLEY Valve, Titanium, Intake, Bead Loc, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 5.04 in. Height, Each

MANLEY Valve, Titanium, Intake, Bead Loc, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 5.04 in. Height, Each

$396.44

MANLEY Valve, Extreme Duty, Exhaust, 1.95 in. Head Dia, 0.3715 in. Stem Dia, 5.02 in. Length, Set of 8

MANLEY Valve, Extreme Duty, Exhaust, 1.95 in. Head Dia, 0.3715 in. Stem Dia, 5.02 in. Length, Set of 8

$995.14

MANLEY Valve, Titanium, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.36 in. Height, Each

MANLEY Valve, Titanium, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.36 in. Height, Each

$307.70

MILODON Valves, Intake, Race, Stainless Steel, 2.20 in. Diameter, Mopar, Small Block, 318, 340, 360, Set of 8

MILODON Valves, Intake, Race, Stainless Steel, 2.20 in. Diameter, Mopar, Small Block, 318, 340, 360, Set of 8

$490.20